Which of the following practices will lead to sustainability?
a.
increased groundwater pumping
b.
fossil fuel use
c.
conservation tillage
d.
increased pesticide use

c.  conservation tillage

Explanation:

Conservation tillage is the most relevant option for the maintaining the sustainability. Sustainability refers to the wiser use of the resources in such a manner so that these resources remains available for the present and future generation needs. The conservation tillage is an agricultural practice in which the residues of the crops like stalks and stubbles are left on the land during harvesting so as to prevent the soil exposed to drastic phenomena of wind and water erosion. This will help in retaining the quality of soil for the next crop.